JP3352065B2 - Fluorescent display tube and driving method thereof - Google Patents

Fluorescent display tube and driving method thereof

Info

Publication number
JP3352065B2
JP3352065B2 JP35271799A JP35271799A JP3352065B2 JP 3352065 B2 JP3352065 B2 JP 3352065B2 JP 35271799 A JP35271799 A JP 35271799A JP 35271799 A JP35271799 A JP 35271799A JP 3352065 B2 JP3352065 B2 JP 3352065B2
Authority
JP
Japan
Prior art keywords
electrode
filament
potential
anode electrode
display tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP35271799A
Other languages
Japanese (ja)
Other versions
JP2001166725A (en
Inventor
川崎博明
小川行雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Futaba Corp
Original Assignee
Futaba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Futaba Corp filed Critical Futaba Corp
Priority to JP35271799A priority Critical patent/JP3352065B2/en
Priority to KR10-2000-0075336A priority patent/KR100382839B1/en
Priority to US09/735,730 priority patent/US6340865B2/en
Priority to TW089126630A priority patent/TW480528B/en
Priority to US09/735,736 priority patent/US6360783B2/en
Publication of JP2001166725A publication Critical patent/JP2001166725A/en
Application granted granted Critical
Publication of JP3352065B2 publication Critical patent/JP3352065B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/15—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen with ray or beam selectively directed to luminescent anode segments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0263—Insulation for air ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/147—Arrangements for the insulation of pipes or pipe systems the insulation being located inwardly of the outer surface of the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0209—Ducting arrangements characterised by their connecting means, e.g. flanges

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Duct Arrangements (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電子を放出するフ
ィラメントを挟んで、蛍光体を塗布したアノード電極と
フィラメントの電子放出を制御する制御電極とを配置し
た蛍光表示管及びその駆動方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent display tube in which an anode electrode coated with a phosphor and a control electrode for controlling the electron emission of the filament are arranged with a filament for emitting electrons interposed therebetween, and a driving method thereof.

【０００２】[0002]

【従来の技術】電子を放出するフィラメントを挟んで、
蛍光体を塗布したアノード電極とフィラメントの電子放
出を制御する制御電極（背面電極）とを対向して配置
し、制御電極の印加電圧を変化させて、フィラメントか
らアノード電極に放出される電子を制御する蛍光表示管
が知られている。図５は、このタイプの蛍光表示管の構
造を示す。図５（ａ）は、アノード電極、制御電極、フ
ィラメントの配置関係を示す平面図を、図５（ｂ）は、
図５（ａ）のＺ―Ｚ部分の断面図を示す。５１は、蛍光
表示管の背面基板で、制御電極（背面電極）５５１〜５
５５を形成してある。５２は、前面基板で、蛍光体５７
１〜５７５を塗布したアノード電極５６１〜５６５を形
成してある。５３は、フィラメントで、両電極の間に張
架し、支持部材５４に固定してある。2. Description of the Related Art A filament that emits electrons is sandwiched between
An anode electrode coated with a phosphor and a control electrode (back electrode) for controlling electron emission of the filament are arranged opposite to each other, and the voltage applied to the control electrode is changed to control electrons emitted from the filament to the anode electrode. A known fluorescent display tube is known. FIG. 5 shows the structure of a fluorescent display tube of this type. FIG. 5A is a plan view showing an arrangement relationship between an anode electrode, a control electrode, and a filament, and FIG.
FIG. 6 shows a cross-sectional view of a ZZ portion in FIG. Reference numeral 51 denotes a back substrate of the fluorescent display tube, and control electrodes (back electrodes) 551 to 5
55 are formed. 52 is a front substrate, and a phosphor 57
Anode electrodes 561 to 565 coated with 1 to 575 are formed. Reference numeral 53 denotes a filament which is stretched between the two electrodes and fixed to a support member 54.

【０００３】制御電極５５１〜５５５には、フィラメン
ト５３の電位より高い正電位（例えば２５ｖ）を印加し
て、フィラメント５３から放出された電子がアノード電
極５６１〜５６５に到達するのを阻止している。例え
ば、アノード電極５６３を選択して発光させるときは、
制御電極５５３の電位を他の制御電極の電位よりも低い
正電位（例えば１２ｖ）を印加すると、制御電極５５３
に対向するアノード電極５６３のみ前記電子の阻止が解
除され、フィラメント５３から放出された電子は、アノ
ード電極５６３に到達する。（例えば、特開昭５５−３
２００号公報参照）。A positive potential (for example, 25 V) higher than the potential of the filament 53 is applied to the control electrodes 551 to 555 to prevent electrons emitted from the filament 53 from reaching the anode electrodes 561 to 565. . For example, when the anode electrode 563 is selected to emit light,
When a positive potential (for example, 12 V) lower than the potential of the other control electrodes is applied to the control electrode 553, the control electrode 553 is controlled.
The blocking of the electrons is released only on the anode electrode 563 facing the anode 53, and the electrons emitted from the filament 53 reach the anode electrode 563. (For example, see JP-A-55-3
No. 200).

【０００４】[0004]

【発明が解決しようとする課題】上記蛍光表示管は、ア
ノード電極の非選択時には、制御電極に高い正電位を印
加して、フィラメントから放出される電子がアノード電
極に到達するのを阻止している。このとき制御電極に
は、高い正電位が印加されているため、フィラメントか
ら電子が放出され、制御電極に電流が流れる。そのため
アノード電極の非選択時にも、大きな電力が消費され
る。また前記のようにアノード電極の非選択時にも、フ
ィラメントから電子が放出されているため、放出された
電子の一部は、非選択アノード電極へも流れ、漏れ発光
を生じる。さらにアノード電極の非選択時には、選択時
よりも高い正電位を制御電極に印加して、フィラメント
から放出された電子がアノード電極に到達するのを阻止
しなければならないため、高い駆動電圧が必要になる。
本発明は、これらの点に鑑み消費電力や漏れ発光が小さ
く、駆動電圧の低い、より薄型の蛍光表示管を提供する
ことを目的とする。When the anode electrode is not selected, the fluorescent display tube applies a high positive potential to the control electrode to prevent electrons emitted from the filament from reaching the anode electrode. I have. At this time, since a high positive potential is applied to the control electrode, electrons are emitted from the filament and a current flows to the control electrode. Therefore, large power is consumed even when the anode electrode is not selected. Also, as described above, even when the anode electrode is not selected, since electrons are emitted from the filament, a part of the emitted electrons also flows to the non-selected anode electrode, causing leakage light emission. Furthermore, when the anode electrode is not selected, a higher positive voltage than that at the time of selection must be applied to the control electrode to prevent the electrons emitted from the filament from reaching the anode electrode. Become.
In view of these points, an object of the present invention is to provide a thinner fluorescent display tube with low power consumption and low leakage light emission and low driving voltage.

【０００５】[0005]

【課題を解決するための手段】本発明は、電子を放出す
るフィラメントを挟んで、蛍光体を塗布したアノード電
極とフィラメントの電子放出を制御する制御電極とを対
向して配置した蛍光表示管において、アノード電極には
フィラメントの電位よりも高い電位を印加し、制御電極
にはフィラメントの電位よりも低い電位を印加し、選択
するアノード電極に対向した制御電極にフィラメントの
電位と同じかそれよりも高い電位を印加する手段を備え
ている。この制御手段により、例えば、制御電極（背面
電極）に負電位を印加してフィラメントから電子が放出
されるのを阻止し、アノード電極の選択時には、選択す
るアノード電極に対向する制御電極にのみ正電位を印加
して、フィラメントから選択されたアノード電極へ電子
が放出されるように制御する。またアノード電極と制御
電極とをマトリックス状に配置する。SUMMARY OF THE INVENTION The present invention relates to a fluorescent display tube in which an anode electrode coated with a phosphor and a control electrode for controlling electron emission of the filament are opposed to each other with a filament for emitting electrons interposed therebetween. A potential higher than the filament potential is applied to the anode electrode, a potential lower than the filament potential is applied to the control electrode, and a potential equal to or higher than the filament potential is applied to the control electrode facing the selected anode electrode. Means for applying a high potential is provided. By this control means, for example, a negative potential is applied to the control electrode (back electrode) to prevent emission of electrons from the filament, and when the anode electrode is selected, only the control electrode opposite to the selected anode electrode is positive. The potential is applied to control the electron emission from the filament to the selected anode electrode. Further, the anode electrode and the control electrode are arranged in a matrix.

【０００６】また制御電極とフィラメントとの間隔が、
アノード電極とフィラメントとの間隔よりも小さくなる
ように、両電極とフィラメントを配置する。このように
配置することにより、フィラメント電位よりも負側にバ
イアスした制御電極の電位がフィラメントに有効に作用
し、フィラメントから放出される電子の制御をより効果
的に行うことができる。さらに本発明は、電子を放出す
るフィラメントを挟んで、蛍光体を塗布したアノード電
極とフィラメントの電子放出を制御する制御電極とを対
向して配置した蛍光表示管において、アノード電極には
フィラメントの電位よりも高い電位を印加し、制御電極
にはフィラメントの電位よりも低い電位を印加し、選択
するアノード電極に対向した制御電極にフィラメントの
電位と同じかそれよりも高い電位を印加してアノード電
極を選択している。The distance between the control electrode and the filament is
The two electrodes and the filament are arranged so as to be smaller than the distance between the anode electrode and the filament. With this arrangement, the potential of the control electrode biased to the negative side of the filament potential effectively acts on the filament, and the electrons emitted from the filament can be more effectively controlled. Further, the present invention provides a fluorescent display tube in which an anode electrode coated with a phosphor and a control electrode for controlling electron emission of the filament are arranged opposite to each other with a filament emitting electrons interposed therebetween. A potential higher than the filament potential is applied to the control electrode, and a potential equal to or higher than the filament potential is applied to the control electrode facing the selected anode electrode. Is selected.

【０００７】[0007]

【発明の実施の形態】図１は、本発明の電界解析に用い
た蛍光表示管の断面図を示す。１１は、ガラスの背面基
板で、制御電極（背面電極）１５を形成してある。１２
は、ガラスの前面基板で、蛍光体１７を塗布したアノー
ド電極１６を形成してある。１３１、１３２は、フィラ
メントである。制御電極１５及びアノード電極１６の幅
は４ｍｍ、フィラメント１３１（１３２）と制御電極と
の間隔は０．１５ｍｍ、フィラメント１３１（１３２）
とアノード電極１６との間隔は０．９ｍｍ、フィラメン
ト１３１と１３２との間隔は２ｍｍ、アノード電極の印
加電圧は１２Ｖ、フィラメント１３１（１３２）の印加
電圧は０Ｖである。制御電極の印加電圧（Ｖｂ）をパラ
メーターとしている。FIG. 1 is a sectional view of a fluorescent display tube used for an electric field analysis according to the present invention. Reference numeral 11 denotes a glass back substrate on which a control electrode (back electrode) 15 is formed. 12
Is a glass front substrate on which an anode electrode 16 coated with a phosphor 17 is formed. 131 and 132 are filaments. The width of the control electrode 15 and the anode electrode 16 is 4 mm, the distance between the filament 131 (132) and the control electrode is 0.15 mm, and the filament 131 (132).
The distance between the filaments 131 and 132 is 2 mm, the voltage applied to the anode electrode is 12 V, and the voltage applied to the filament 131 (132) is 0 V. The applied voltage (Vb) of the control electrode is used as a parameter.

【０００８】図２は、図1の蛍光表示管の電界解析に基
づき、アノード電極の電流（Ｉp）及び制御電極の電流
（Ｉback）の電流密度を示す。縦軸は、電流密度を、横
軸は、両電極の幅方向の距離（Distance）を示す。横軸
の（０．００）は、フィラメント１３１の位置に、
（２．００）は、フィラメント１３２の位置に相当す
る。この電界解析の結果から分かるように、制御電極の
印加電圧（Ｖｂ）がフィラメントの電位よりも低いとき
は、アノード電極の電流（Ｉp）及び制御電極の電流
（Ｉback）はほとんど流れないが、印加電圧（Ｖｂ）が
２Ｖになるとアノード電極の電流（Ｉp）は、アノード
電極１６の幅全体（４ｍｍ）にほぼ均一に流れるように
なる。そして制御電極の電流（Ｉback）は、フィラメン
トの近傍（横軸の(（０．００）、（２．００））にお
いてのみ流れる。この結果から、印加電圧（Ｖｂ）がフ
ィラメントの電位よりも低いときには、フィラメント１
３１（１３２）から電子が放出されていないことが分か
る。FIG. 2 shows the current density of the current (Ip) of the anode electrode and the current (Iback) of the control electrode based on the electric field analysis of the fluorescent display tube of FIG. The vertical axis indicates the current density, and the horizontal axis indicates the distance (Distance) between the two electrodes in the width direction. (0.00) on the horizontal axis indicates the position of the filament 131,
(2.00) corresponds to the position of the filament 132. As can be seen from the results of the electric field analysis, when the applied voltage (Vb) of the control electrode is lower than the potential of the filament, the current (Ip) of the anode electrode and the current (Iback) of the control electrode hardly flow. When the voltage (Vb) becomes 2 V, the current (Ip) of the anode electrode flows almost uniformly over the entire width (4 mm) of the anode electrode 16. The current (Iback) of the control electrode flows only in the vicinity of the filament (((0.00), (2.00) on the horizontal axis). From this result, the applied voltage (Vb) is lower than the potential of the filament. Sometimes filament 1
It can be seen from FIG. 31 (132) that no electrons have been emitted.

【０００９】図３は、本発明の実施例の蛍光表示管を示
す。図３（ａ）は、アノード電極、制御電極（背面電
極）、フィラメントの配置関係を示す平面図を、図３
（ｂ）は、図３（ａ）のＹ―Ｙ部分の断面図を示す。３
１は、ガラスの背面基板で、制御電極（背面電極）３５
１〜３５５を形成してある。３２は、ガラスの前面基板
で、蛍光体３７１〜３７５を塗布したアノード電極３６
１〜３６５を形成してある。３３は、フィラメントで、
両電極の間に張架し、支持部材３４に固定してある。ア
ノード電極３６１〜３６５の５個の各電極は、図３
（ａ）のように配線用導体で直列に接続してある。制御
電極３５１は、アノード電極３６１と対向し、制御電極
３５２は、アノード電極３６２と対向している。以下同
様に各制御電極は、それぞれのアノード電極と対向して
いる。そしてアノード電極３６１〜３６５と制御電極３
５１〜３５５は、マトリックス状に配置してある。FIG. 3 shows a fluorescent display tube according to an embodiment of the present invention. FIG. 3A is a plan view showing an arrangement relationship between an anode electrode, a control electrode (back electrode), and a filament.
FIG. 3B is a cross-sectional view taken along the line YY in FIG. 3
Reference numeral 1 denotes a glass back substrate, and a control electrode (back electrode) 35
1 to 355 are formed. Reference numeral 32 denotes a glass front substrate, which is an anode electrode 36 coated with phosphors 371 to 375.
1 to 365 are formed. 33 is a filament,
It is stretched between the two electrodes and fixed to the support member 34. Each of the five anode electrodes 361 to 365 is shown in FIG.
As shown in (a), they are connected in series by a wiring conductor. The control electrode 351 faces the anode electrode 361, and the control electrode 352 faces the anode electrode 362. Hereinafter, similarly, each control electrode is opposed to each anode electrode. The anode electrodes 361 to 365 and the control electrode 3
51 to 355 are arranged in a matrix.

【００１０】制御電極３５１〜３５５には、負電位を印
加し、フィラメント３３からの電子の放出を阻止してい
る。この状態で、制御電極３５３に正電位を印加する
と、フィラメント３３の内、今まで制御電極３５３の負
電位の影響を受けていた部分は、正電位の影響を受ける
ことになり、その部分の電子放出の阻止は解除され、電
子を放出する。そして放出された電子は、対向するアノ
ード電極３６３の５個の電極の内、正電位が印加されて
いる電極に到達する。[0010] A negative potential is applied to the control electrodes 351 to 355 to prevent emission of electrons from the filament 33. When a positive potential is applied to the control electrode 353 in this state, the portion of the filament 33 which has been affected by the negative potential of the control electrode 353 up to now is affected by the positive potential, and the electron of that portion is affected. The inhibition of emission is released, and electrons are emitted. The emitted electrons reach the electrode to which a positive potential is applied among the five electrodes of the opposed anode electrode 363.

【００１１】図４は、本発明の実施例のアノード電極の
パターン例を示す。図４（ａ）は、７セグメントパター
ンの例で、各７セグメント群と各制御電極とは、図３と
同様に対向して配置される（制御電極は、図示してな
い）。７セグメント群の各電極は、隣の７セグメント群
の各電極と共通のもの同士が配線導体により互いに接続
されている。図４（ｂ）は、５×７ドットパターンの例
で、各５×７ドット群と各制御電極とは、図３と同様に
対向して配置される（制御電極は、図示してない）。５
×７ドット群の各電極は、隣の５×７ドット群の各電極
と共通のもの同士が配線導体により互いに接続されてい
る。図４（ｂ）は、１行目と７行目のみの配線を図示し
てある。図４（ａ）、（ｂ）は、いずれもアノード電極
と制御電極は、マトリックスを構成している。本発明
は、これらのパターンに限らずその他の従来のいずれの
パターンにも適用することができる。FIG. 4 shows an example of a pattern of an anode electrode according to an embodiment of the present invention. FIG. 4A shows an example of a 7-segment pattern in which each 7-segment group and each control electrode are arranged to face each other as in FIG. 3 (control electrodes are not shown). Each electrode of the 7 segment group has the same electrode as each electrode of the adjacent 7 segment group connected to each other by a wiring conductor. FIG. 4B is an example of a 5 × 7 dot pattern, in which each 5 × 7 dot group and each control electrode are arranged facing each other as in FIG. 3 (control electrodes are not shown). . 5
The electrodes of the × 7 dot group, which are common to the electrodes of the adjacent 5 × 7 dot group, are connected to each other by a wiring conductor. FIG. 4B shows the wirings of only the first and seventh rows. 4A and 4B, both the anode electrode and the control electrode constitute a matrix. The present invention is not limited to these patterns, and can be applied to any other conventional patterns.

【００１２】本発明は、直視型蛍光表示管、透視型蛍光
表示管のいずれのタイプのものにも摘用することができ
る。前面基板及び背面基板は、絶縁材であれば透光性、
不透光性のいずれであってもよいが、蛍光表示管が直視
型か透視型かにより、少なくとも観察側基板が透光性を
有するものであればよい。アノード電極及び制御電極
は、透光性、不透光性のいずれあってもよいが、蛍光表
示管が直視型か透視型かにより、少なくとも観察側基板
の電極が透光性を有するものであればよい。透光性電極
は、透明導電材で形成してもよいし、アルミ等の不透明
導電材に透光孔を形成したものであってもよい。制御電
極の形状は、ストライプ状、ワイヤー状、メッシュ状等
従来のいずれのタイプのものであってもよい。フィラメ
ントの張架方向は、アノード電極または制御電極と交差
させてもよいし、平行させてもよい。本発明の蛍光表示
管は、必要に応じて耐圧用支柱を設けてもよい。The present invention can be applied to any of a direct-view fluorescent display tube and a transparent fluorescent display tube. The front substrate and the rear substrate are translucent if they are insulating materials,
It may be non-translucent, but it is sufficient if at least the observation-side substrate has translucency depending on whether the fluorescent display tube is a direct-view type or a transparent type. The anode electrode and the control electrode may be translucent or non-translucent. Depending on whether the fluorescent display tube is a direct-view type or a translucent type, at least the electrode of the observation-side substrate has translucency. I just need. The light-transmitting electrode may be formed of a transparent conductive material, or may be formed by forming a light-transmitting hole in an opaque conductive material such as aluminum. The shape of the control electrode may be any conventional type such as a stripe shape, a wire shape, and a mesh shape. The stretching direction of the filament may cross the anode electrode or the control electrode, or may be parallel to the anode electrode or the control electrode. The fluorescent display tube of the present invention may be provided with a pressure-resistant support if necessary.

【００１３】[0013]

【発明の効果】本発明は、アノード電極の非選択時に
は、制御電極（背面電極）に負電位を印加してフィラメ
ントからの電子放出を阻止し、アノード電極の選択時の
み、選択するアノード電極に対向した制御電極にのみ正
電位を印加して、その制御電極の電位の影響を受けてい
るフィラメントの部分のみ電子放出の阻止を解除し、選
択するアノード電極に電子を放出している。そのため、
消費電力を小さくすることができ、駆動電圧を低くする
ことができ、かつ漏れ発光も小さくできる。また制御電
極は、フィラメントに極接近させることができるから、
制御電極の電位がフィラメントに有効に作用し、フィラ
メントから放出される電子の制御をより効果的に行うこ
とができる。かつ蛍光表示管を薄くすることができる。According to the present invention, when the anode electrode is not selected, a negative potential is applied to the control electrode (back electrode) to prevent the emission of electrons from the filament. A positive potential is applied only to the opposing control electrode, the inhibition of electron emission is released only in the portion of the filament that is affected by the potential of the control electrode, and electrons are emitted to the selected anode electrode. for that reason,
Power consumption can be reduced, driving voltage can be reduced, and leakage light emission can be reduced. Also, since the control electrode can be brought very close to the filament,
The potential of the control electrode effectively acts on the filament, and the electrons emitted from the filament can be more effectively controlled. In addition, the thickness of the fluorescent display tube can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の電界解析に用いた蛍光表示管の断面図
を示す。FIG. 1 is a sectional view of a fluorescent display tube used for an electric field analysis according to the present invention.

【図２】本発明の電界解析結果に基づくアノード電極と
制御電極の電流密度を示す。FIG. 2 shows current densities of an anode electrode and a control electrode based on an electric field analysis result of the present invention.

【図３】本発明の実施例の蛍光表示管の平面図及び断面
図を示す。FIG. 3 shows a plan view and a sectional view of a fluorescent display tube according to an embodiment of the present invention.

【図４】本発明の実施例の蛍光表示管のアノード電極パ
ターンの平面図を示す。FIG. 4 is a plan view of an anode electrode pattern of the fluorescent display tube according to the embodiment of the present invention.

【図５】従来の蛍光表示管の平面図及び断面図を示す。FIG. 5 shows a plan view and a sectional view of a conventional fluorescent display tube.

【符号の説明】[Explanation of symbols]

１１、３１ 背面基板 １２、３２ 前面基板 １３、３３ フィラメント １５、３５１〜３５５ 制御電極（背面電極） １６、３６１〜３６５ アノード電極 １７、３７１〜３７５ 蛍光体 11, 31 back substrate 12, 32 front substrate 13, 33 filament 15, 351-355 control electrode (back electrode) 16, 361-365 anode electrode 17, 371-375 phosphor

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G09G 3/12 301 G09G 3/20 611 G09G 3/30 301 H01J 31/15 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) G09G 3/12 301 G09G 3/20 611 G09G 3/30 301 H01J 31/15

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】蛍光表示管内にフィラメントを挟んで複数
の制御電極の各々と蛍光体を塗布したアノード電極とを
対向して配置し、該アノード電極の各電極は隣のアノー
ド電極の各電極と接続されている蛍光表示管において、
該複数の制御電極にフィラメントの電位よりも低い電位
を印加し、選択するアノード電極の電極にフィラメント
の電位よりも高い電位を印加し、該選択するアノード電
極の電極に対向する制御電極にフィラメントの電位と同
じかそれよりも高い電位を印加する手段を備えたことを
特徴とする蛍光表示管。1. A plurality across the filament fluorescent display tube
Each of the control electrodes and the anode electrode coated with the phosphor are arranged to face each other , and each of the anode electrodes is adjacent to the anode electrode.
In the fluorescent display tube connected to each electrode of the
Applying a potential lower than the potential of the filament to the control electrode of the plurality of, applying a potential higher than the potential of the filament electrodes of the anode electrode to be selected, the filament control electrode opposed to the electrode of the anode electrode to the selected A fluorescent display tube comprising means for applying a potential equal to or higher than the potential. 【請求項２】請求項１に記載の蛍光表示管において、制
御電極とアノード電極とをマトリックス状に配置したこ
とを特徴とする蛍光表示管。2. The fluorescent display tube according to claim 1, wherein the control electrodes and the anode electrodes are arranged in a matrix. 【請求項３】請求項１に記載の蛍光表示管において、制
御電極とフィラメントとの間隔がアノード電極とフィラ
メントとの間隔よりも小さいことを特徴とする蛍光表示
管。3. The fluorescent display tube according to claim 1, wherein a distance between the control electrode and the filament is smaller than a distance between the anode electrode and the filament. 【請求項４】蛍光表示管内にフィラメントを挟んで複数
の制御電極の各々と蛍光体を塗布したアノード電極とを
対向して配置し、該アノード電極の各電極は隣のアノー
ド電極の各電極と接続されている蛍光表示管において、
該複数の制御電極にフィラメントの電位よりも低い電位
を印加し、選択するアノード電極の電極にフィラメント
の電位よりも高い電位を印加し、該選択するアノード電
極の電極に対向する制御電極にフィラメントの電位と同
じかそれよりも高い電位を印加して、アノード電極の電
極を選択することを特徴とする蛍光表示管の駆動方法。4. A plurality across the filament fluorescent display tube
Each of the control electrodes and the anode electrode coated with the phosphor are arranged to face each other , and each of the anode electrodes is adjacent to the anode electrode.
In the fluorescent display tube connected to each electrode of the
Applying a potential lower than the potential of the filament to the control electrode of the plurality of, applying a potential higher than the potential of the filament electrodes of the anode electrode to be selected, the filament control electrode opposed to the electrode of the anode electrode to the selected by applying the same or a higher potential than the potential of the anode electrode collector
A method for driving a fluorescent display tube, comprising selecting a pole .
JP35271799A 1999-12-13 1999-12-13 Fluorescent display tube and driving method thereof Expired - Fee Related JP3352065B2 (en)

Priority Applications (5)

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JP35271799A JP3352065B2 (en) 1999-12-13 1999-12-13 Fluorescent display tube and driving method thereof
KR10-2000-0075336A KR100382839B1 (en) 1999-12-13 2000-12-11 Fluorescent display device and method for driving same
US09/735,730 US6340865B2 (en) 1999-12-13 2000-12-13 Fluorescent display device and method for driving same
TW089126630A TW480528B (en) 1999-12-13 2000-12-13 Fluorescent display device and method for driving same
US09/735,736 US6360783B2 (en) 1999-12-13 2000-12-13 Thermal insulating panels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35271799A JP3352065B2 (en) 1999-12-13 1999-12-13 Fluorescent display tube and driving method thereof

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JP2001166725A (en) 2001-06-22
US20010006329A1 (en) 2001-07-05
KR20010062327A (en) 2001-07-07
US6360783B2 (en) 2002-03-26
US6340865B2 (en) 2002-01-22
KR100382839B1 (en) 2003-05-09
TW480528B (en) 2002-03-21
US20010003993A1 (en) 2001-06-21

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